What type of database is RADIUS associated with?

RADIUS, which stands for Remote Authentication Dial-In User Service, is primarily associated with security databases. It is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service. When a client attempts to connect to a network, RADIUS works to authenticate their credentials against a security database, ensuring that only authorized users gain access.

In terms of its functionality, RADIUS stores user credentials securely, typically using a database system that may include usernames, passwords, and various user attributes necessary for authorizing access to network services. This aligns closely with the characteristics of a security database, as its main focus is to protect sensitive information related to users and their access rights.

The other types of databases mentioned are not directly associated with RADIUS. Performance databases focus on monitoring and optimizing system performance; storage databases are related to data storage rather than security; and transaction databases are geared more toward recording transactions and ensuring data integrity in business applications. Therefore, the association of RADIUS with a security database is the most accurate characterization of its role in network security management.